public class TopStatic {
	public static int sum(int x, int y) {
		return x + y;
	}
	
	public int minus(int x, int y) {
		return x - y;
	}
	
	public static void main(String[] args) {
		int s1 = TopStatic.sum(100, 200);
		System.out.println("TopStatic.sum(100, 200):"+s1);
		TopStatic t = new TopStatic();
		int s2 = t.sum(100, 200);
		System.out.println("t.sum(100,200):"+s2);
		int s3 = t.minus(100, 200);
		System.out.println("t.minus(100, 200):"+s3);
	}
}
